Imperial Petroleum Inc./Marshall Islands - Oct 9, 2025 SCHEDULE 13D/A Report for C3is Inc. Common Stock, par value $0.01 per share (CISS)

Filing Manager: Imperial Petroleum Inc./Marshall Islands
Reporting Manager: Imperial Petroleum Inc.
Security: C3is Inc. Common Stock, par value $0.01 per share
Symbol: CISS
Shares outstanding: 8.72M shares
Disclosed Ownership: 6M shares
Ownership: 68.8%
Form type: SCHEDULE 13D/A
Date filed: 10/10/2025, 05:00 PM
Date of event: Oct 9, 2025
Previous filing: Apr 15, 2025
SEC: View on sec.gov

Reporting Managers (1)

Name	Ownership	Shares Owned	sole voting power	shared voting power	Signature	Title	CIK
Imperial Petroleum Inc.	68.8%	6M	6M	0	Harry N. Vafias	Chief Executive Officer	0001876581